摘要
通过河北石湖金矿野外产出的地质现象及矿脉间的穿插关系,结合显微镜和电子探针进行综合分析。本矿区主要为两个矿化阶段,即石英-黄铁矿阶段和石英-多金属硫化物阶段:石英-黄铁矿阶段主要产出矿物:石英、黄铁矿、银金矿和金银矿等;石英-多金属硫化物阶段主要产出矿物:石英、黄铁矿、闪锌矿、方铅矿、黄铜矿、银金矿、金银矿、硫碲银矿、辉银矿和自然银等。本文着重对这两个阶段产出的含Au、Ag矿物特征进行了探讨性研究。其中两个矿化阶段中都产出银金矿与金银矿,随着温度的下降Au的含量呈下降趋势Ag含量呈上升趋势,Au与Ag呈负相关性,类质同象替代。本区产出的硫碲银矿是前人研究中未见有报道的矿物,产出于晚期多金属脉中并与闪锌矿、黄铁矿和黄铜矿共生。Ag含量与Te含量成弱负相关性。
Through geological phenomenon and interspersed relationships among underground veins of Shihu gold deposit,Hebei produced in field,combined with comprehensive analysis by microscope and electron microprobe analyses,two major ore-forming stages could be defined for this mineral area including：Quartz-pyrite stage and Quartz-polymetallic sulfide stage.Minerals out of Quartz-pyrite stage mainly include：Quartz,Pyrite,Electrum,Kustelite.Those out of Quartz-polymetallic sulfide stage mainly include：Quartz,Pyrite,Sphalerite,Galena,Chalcopyrite,Electrum,Kustelite,Cervelleite,Argentite,Natural Silver.Studies in this dissertation focus on mineral properties of Au and Ag produced by these two stages.Both the two stages will yield out Electrum and Küstelite.Along with drop of temperature,content of Au presents a declining trend while content of Ag presents an increasing trend.There is a negative correlation between Au and Ag with isomorphism presenting.Cervelleite produced in this mineral area hasn‘ t seen before in others＇studies.It is mainly produced in the late-stage multi-metal veins intergrowing with Sphalerite,Pyrite and Chalcopyrite.Ag content presents a weak negative correlation with the Te content.
出处
《电子显微学报》
CAS
CSCD
2013年第5期396-402,共7页
Journal of Chinese Electron Microscopy Society
基金
中国地质调查局资助项目(No.1212011220865)
